CN115772350A - Bactericidal antiviral paint and preparation method thereof - Google Patents
Bactericidal antiviral paint and preparation method thereof Download PDFInfo
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- CN115772350A CN115772350A CN202211439726.6A CN202211439726A CN115772350A CN 115772350 A CN115772350 A CN 115772350A CN 202211439726 A CN202211439726 A CN 202211439726A CN 115772350 A CN115772350 A CN 115772350A
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- 230000000840 anti-viral effect Effects 0.000 title claims abstract description 66
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000003973 paint Substances 0.000 title claims description 22
- 238000000576 coating method Methods 0.000 claims abstract description 78
- 239000010949 copper Substances 0.000 claims abstract description 77
- 239000011248 coating agent Substances 0.000 claims abstract description 74
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 66
- 229910052802 copper Inorganic materials 0.000 claims abstract description 66
- 150000001875 compounds Chemical class 0.000 claims abstract description 63
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- 238000003756 stirring Methods 0.000 claims description 61
- 239000000725 suspension Substances 0.000 claims description 45
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- 238000001035 drying Methods 0.000 claims description 4
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- RXPAJWPEYBDXOG-UHFFFAOYSA-N hydron;methyl 4-methoxypyridine-2-carboxylate;chloride Chemical compound Cl.COC(=O)C1=CC(OC)=CC=N1 RXPAJWPEYBDXOG-UHFFFAOYSA-N 0.000 claims description 3
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- 235000013399 edible fruits Nutrition 0.000 abstract 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 17
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- 230000000052 comparative effect Effects 0.000 description 7
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 7
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 7
- 229940112669 cuprous oxide Drugs 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 6
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- 229910016514 CuFeO2 Inorganic materials 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
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- 239000004111 Potassium silicate Substances 0.000 description 1
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- CYKDLUMZOVATFT-UHFFFAOYSA-N ethenyl acetate;prop-2-enoic acid Chemical compound OC(=O)C=C.CC(=O)OC=C CYKDLUMZOVATFT-UHFFFAOYSA-N 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N ethyl butylhexanol Natural products CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
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- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
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Images
Abstract
The invention discloses a bactericidal and antiviral coating and a preparation method thereof, and relates to the technical field of coatings. The hydrophilic emulsion, the porous filler and the functional material added with the copper-containing compound are cooperatively realized, wherein the copper-containing compound is CuFeO 2 Powder, or Ce, la or Bi doped CuFeO 2 And (3) powder. The coating comprises the following components in parts by weight: 10-30 parts of water, 0.5-2.5 parts of copper-containing compound, 20-35 parts of hydrophilic emulsion, 0.8-1.2 parts of film-forming assistant, 0.8-1.2 parts of defoaming agent, 0.1-0.3 part of hydroxyethyl cellulose, 0.8-1.2 parts of polyethylene glycol, 1.2-3 parts of other assistant, 15-25 parts of pigment and 20-35 parts of porous filler. The coating has the characteristics of super-hydrophilicity, porous adsorbability and microorganism killing effect, so that the coating can play a role in high-efficiency, long-term sterilization and virus resistanceAnd (5) fruit.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a copper-containing compound bactericidal antiviral coating and a preparation method thereof.
Background
The adoption of disinfectants such as disinfecting alcohol, sodium hypochlorite and the like to the public space and the indoor environment is an effective mode for reducing virus propagation, but the mode is difficult to adapt to various application places due to the short effectiveness of the disinfectants and has continuous and effective antiviral effect. Indirect transmission can be controlled by developing effective viral surface inactivation techniques to reduce the lifetime of the virus on contaminated surfaces.
The prior art shows that many inorganic materials such as silver, copper and TiO 2 Photocatalysts have effective biocidal properties, and coatings and fabrics incorporating these inorganic powders are often used as antibacterial and antiviral materials. Copper and its alloys are promising materials for the destruction of viruses and several pandemic microorganisms due to their excellent antiviral and antibacterial properties. Although many studies have demonstrated the antiviral properties of copper and its compounds, there is a lack of extensive research into the antiviral properties of copper compounds of different valence states and their use in architectural coatings. Researches show that the antiviral activity of cuprous ions is stronger than that of the cupric ions, but due to the problems of complexity of the composition of the architectural coating, such as acidity, alkalinity, oxidizability and the like, the cuprous antiviral material is difficult to stably exist in a coating system and is ineffective, or is difficult to stably and uniformly fuse with the coating system to precipitate or discolor.
Patent application CN111849266B discloses an antiviral coating and a preparation method thereof, wherein an antiviral functional material related to the coating is cuprous oxide wrapped by glass powder silicate, the cuprous oxide is wrapped by the glass powder silicate to improve the existence duration of cuprous ions in a paint film, and the pH value of the coating can be between 4 and 6 by using ethylene-vinyl acetate copolymer emulsion or vinyl acetate-acrylic acid copolymer emulsion as a film forming substance to reduce the probability of oxidation of the cuprous ions. However, no matter what measures are taken, such as glass powder silicate loading and emulsion type adjustment, the antiviral effect of the functional material is still that cuprous oxide plays a role, and the cuprous oxide is still easily oxidized due to the structure of the cuprous oxide, so that the cuprous oxide oxidizes monovalent copper into divalent copper.
Patent application CN 113321956A discloses an inorganic interior wall coating with aldehyde-removing, antibacterial and antiviral functions, wherein the purifying and antiviral functions are realized by adopting modified glass powder and modified acrylic acid aldehyde-removing emulsion potassium silicate. CN113652110B discloses a monoatomic antibacterial antiviral aldehyde-removing paint additive for interior wall paint, which adopts transition metals of Ag, zn, cu and Mn monoatomic and TiO 2 、SiO 2 The carrier is compounded to realize functionality. Comprehensively research the related published patent technologies, mostly adopting transition metal ions and photocatalytic TiO 2 And ZnO or organic antiviral agents, but these techniques have disadvantages of cytotoxicity, low safety, and the like, require light to act, are difficult to adapt to various application places, and have a sustained and effective antiviral effect.
Disclosure of Invention
Aiming at the problems, the invention provides a bactericidal antiviral coating which has good bactericidal and antiviral effects, is durable, safe and environment-friendly, and a preparation method thereof.
The technical scheme of the invention is as follows: a bactericidal and antiviral coating comprises a copper-containing compound, a hydrophilic emulsion and a porous filler.
The copper-containing compound is CuFeO 2 Powdered or Ce, la or Bi doped CuFeO 2 And (3) powder.
The CuFeO 2 The preparation method of the powder comprises the following steps:
adding 0.02-0.04mol Fe (NO) 3 ) 3 •9H 2 O and 0.02-0.04mol Cu (NO) 3 ) 2 •3H 2 Dissolving O in 120-160 mL distilled water to form a clear solution; then adding 0.4-0.6mol of NaOH, and stirring to obtain a colloidal suspension; adding 2-4ml of propane into the suspensionAn aldehyde;
then, transferring the suspension into a 200ml stainless steel autoclave with a polytetrafluoroethylene lining, and carrying out hydrothermal reaction at 200 ℃ for 24-48 h;
after hydrothermal reaction, the autoclave is naturally cooled to room temperature, and the solid product is filtered, washed, dried and ground to obtain the catalyst.
Ce. La or Bi doped CuFeO 2 The preparation method of the powder comprises the following steps:
first, 1.3X 10 -3 -3.3×10 -3 Dissolving mol metal nitrate in 18-28g deionized water, stirring to dissolve, adding prepared 0.2-0.5g CuFeO 2 The powder is prepared by stirring, filtering, drying and grinding.
The metal nitrate is one or more of cerium nitrate, lanthanum nitrate and bismuth nitrate.
The hydrophilic emulsion is one or more of 502 styrene-acrylic emulsion, pure acrylic emulsion and silicone acrylic emulsion.
The porous filler is one or two of zeolite powder and diatomite.
0.5-2.5 parts of copper-containing compound, 20-35 parts of hydrophilic emulsion and 20-35 parts of porous filler;
also comprises the following components: 10-30 parts of water, 0.8-1.2 parts of film-forming additive, 0.8-1.2 parts of defoaming agent, 0.1-0.3 part of hydroxyethyl cellulose, 0.8-1.2 parts of polyethylene glycol, 1.2-3 parts of other additives and 15-25 parts of pigment;
the other auxiliary agents are a mixture of a wetting agent, a dispersing agent, a thickening agent and a pH regulator, wherein the mass ratio of the wetting agent to the dispersing agent to the thickening agent to the pH regulator is 1-1.2.
A preparation method of a bactericidal and antiviral coating comprises the following steps:
s1, firstly, mixing the obtained copper-containing compound, porous filler and water in proportion, and stirring to prepare a functional material suspension for later use;
s2, mixing water, hydroxyethyl cellulose, polyethylene glycol and other auxiliary agents, and stirring at 600-800rpm to obtain slurry;
s3, adding the pigment and the porous filler into the obtained slurry in sequence, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
s4, adding the hydrophilic emulsion, the film-forming assistant and the defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm;
and S5, adding the functional material suspension, and stirring at a low speed of 500-600rpm to obtain the coating.
The invention has the following advantages:
1. according to the invention, through the optimization of a film forming substance, the addition of a porous filler and the addition of a copper-containing compound antiviral functional material, the problems of low and non-persistent antiviral effect of the existing coating are solved, and meanwhile, the antiviral effect is further improved by ion doping, the coating is endowed with a bactericidal function, and a multifunctional synergistic effect is realized.
2. The invention solves the problem of instability and nonuniformity in the existing coating preparation process, and the addition of the antiviral functional material does not influence the coating system.
3. The invention develops a low-temperature hydrothermal method for preparing the cuprous antiviral functional material for the first time, and the prepared cuprous ferrite has higher stability than cuprous oxide, so that the antiviral performance in the paint is more durable due to the high stability.
Drawings
FIG. 1 is an XRD pattern of a functional material comprising a copper compound;
FIG. 2 is a diagram of the effect of the copper-containing compound bactericidal and antiviral paint and the bacterial virus φ A039: (a) adding 1 part of copper-containing compound to the coating formula; (b) adding 2 parts of copper-containing compound into the coating formula.
Detailed Description
The present invention will be described in further detail in order to make the objects, technical solutions and advantageous effects of the present invention more apparent. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A copper-containing compound bactericidal antiviral coating comprises the following components: water, copper-containing compounds, hydrophilic emulsions, film-forming aids, defoamers, hydroxyethyl cellulose, polyethylene glycol, other aids (including wetting agents, dispersants, thickeners, pH adjusters), pigments (such as titanium dioxide), and porous fillers.
Wherein, the water, the copper-containing compound, the hydrophilic emulsion, the film forming auxiliary agent, the defoaming agent, the hydroxyethyl cellulose, the polyethylene glycol, other auxiliary agents (wetting agent, dispersing agent, thickening agent, pH regulator and the like), the pigment and the porous filler respectively account for the following components in parts by weight: 10-30 parts, 0.5-2.5 parts, 20-35 parts, 0.8-1.2 parts, 0.1-0.3 part, 0.8-1.2 parts, 1.2-3 parts, 15-25 parts and 20-35 parts.
The copper-containing compound is CuFeO 2 Powder (i.e. cuprous ferrite powder), or Ce, la, or Bi doped CuFeO 2 One or more of the powders.
The hydrophilic emulsion is one or more of 502 styrene-acrylic emulsion, pure acrylic emulsion and silicone acrylic emulsion. The emulsion is a film forming substance, so that the coating forms a uniform and stable paint film surface layer
The porous filler is one or two of zeolite powder and diatomite. The addition of fillers changes the physical and chemical properties of the coating film or paint. The invention makes the coating have porosity by adding the porous filler.
The film-forming assistant is preferably hexadecanol ester or dodecyl alcohol ester with diester structure.
The defoaming agent is preferably one or two of water-based silicone oil, NXZ and A-100.
The other auxiliary agents are a mixture of a wetting agent, a dispersing agent, a thickening agent and a pH regulator, wherein the mass ratio of the wetting agent to the dispersing agent to the thickening agent to the pH regulator is as follows: (1-1.2): (1-1.2): (0.4-0.6) (0.2-0.8);
the wetting agent is preferably polyethylene glycol octyl phenyl ether X-100; the dispersant is preferably a 5040 dispersant; the thickening agent is preferably ASE-60, and the pH regulator is preferably one or more of a multifunctional amine auxiliary agent, KOH, naOH and HCl.
The pigment is rutile titanium dioxide, and the color of the coating is adjusted, or the whiteness of the coating is adjusted.
Water in the present invention is a solvent; the film-forming auxiliary agent is beneficial to coating and film forming; defoaming by using a defoaming agent to prevent bubbles from appearing during coating, otherwise, the coating is not uniform; hydroxyethyl cellulose is used as a thickening agent to adjust the stability of a complex mixture or a formula system; the polyethylene glycol regulates the stability of the formula, improves the dispersibility and prevents precipitation.
A preparation method of a copper-containing compound bactericidal antiviral coating comprises the following steps:
(1) Firstly, mixing the obtained copper-containing compound, porous filler and water according to a certain proportion, and stirring to prepare a functional material suspension for later use.
(2) Mixing water, hydroxyethyl cellulose, polyethylene glycol and other auxiliary agents, and stirring at 600-800rpm to obtain slurry;
(3) Adding the pigment and the porous filler into the obtained slurry in sequence according to the formula amount, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
(4) Adding the hydrophilic emulsion, the film forming additive and the defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm;
(5) Adding the functional material suspension, and stirring at low speed of 500-600rpm to obtain the coating.
The preparation method of the copper-containing compound comprises the following steps:
adding 0.02-0.04mol Fe (NO) 3 ) 3 •9H 2 O and 0.02-0.04mol Cu (NO) 3 ) 2 •3H 2 Dissolving O in 120-160 mL distilled water to form a clear solution; thus, the product precursor is uniformly dissolved;
then adding 0.4-0.6mol of NaOH, stirring to obtain a colloidal suspension, adding 2-4ml of propionaldehyde serving as a reducing agent into the suspension, and stirring and mixing;
adding NaOH to create an alkaline environment, so that the precursor is converted into metal hydroxide colloidal suspension;
the purpose of adding propionaldehyde is as follows: as the reducing agent, a high-valence metal is reduced to a low-valence metal.
Transferring the suspension into a 200ml stainless steel autoclave with a polytetrafluoroethylene lining, and carrying out hydrothermal reaction at 200 ℃ for 24-48 h;
moving to an autoclave to perform hydrothermal reaction on the precursor under certain temperature and pressure. Under the condition, the reducing agent propionaldehyde can play a role, and in the presence of propionaldehyde, cu & lt 2+ & gt is reduced to Cu & lt + & gt and combined with Fe & lt 3+ & gt and O & lt 2+ & gt to form CuFeO2.
After the hydrothermal reaction, the high-pressure kettle is naturally cooled to room temperature, and the solid product is filtered, washed and dried to obtain copper-containing compound powder.
Thus, the obtained hydrothermal precipitate is washed to remove impurity ions such as nitrate ions and the like, and dried to obtain pure CuFeO2 powder.
Wherein, ce, la or Bi doped CuFeO 2 The preparation method comprises the following steps:
mixing 1.3X 10 -3 -3.3×10 -3 Dissolving mol metal nitrate (cerous nitrate, lanthanum nitrate or bismuth nitrate) in 18-28g deionized water, stirring to dissolve, adding prepared 0.2-0.5g CuFeO 2 Stirring, filtering and drying the powder to obtain CuFeO doped with Ce, la or Bi 2 And (3) powder functional materials.
In the preparation method of the copper-containing compound, the reaction must be carried out in a 200mL autoclave at the reaction temperature of 200 ℃ or above and under the formula system, otherwise, the ternary transition metal oxide CuFeO is difficult to form 2 After investigation, cuFeO 2 Usually, high-temperature solid-phase reaction or sol-gel method is used for post-treatment at high temperature; according to the invention, the prepared coating has high stability by adopting a low-temperature hydrothermal method.
The invention solves the problems of poor chemical stability, easy oxidation, difficult integration into a coating formula system and the like of cuprous ions, solves the technical problems of poor and difficult lasting effects of the bactericidal and antiviral coating, and realizes the purpose of improving the safety of the living environment of people.
The invention adds CuFeO with high stability 2 The compound realizes high-efficiency and long-acting sterilization and antiviral effects, effectively controls microbial pollution of human living environment, improves the biological safety of living environment, and provides a novel functional material for the antibacterial and antiviral paint.
The copper-containing compound sterilization mechanism is mainly attributed to the formation of active oxygen species, and under oxidative stress, the copper-containing compound generates active oxygen species, and destroys the cell structure of bacteria through chemical reduction reaction, fenton reaction and the like. The antiviral mechanism of the copper-containing compounds is mainly due to the release of +1 copper ions, i.e. "entry" of +1 copper ions into the cells, by binding to the strands of DNA and RNA and cross-linking within and between the strands, destroying the viral genome, limiting their metabolic, respiratory and reproductive processes.
CuFeO 2 Rhombohedral structure with R-3m space groups in which the iron ions are bound to 6O atoms 2- Ionic coordinated, edge-shared FeO 6 Octahedron forming FeO 2 Unit, copper ion and adjacent FeO 2 2 oxygen ions in the unit are linearly coordinated, and Cu ions and Fe ions respectively have the valence of +1 and +3, so that CuFeO is formed by virtue of the unique structure and the oxidation state of elements 2 The antibacterial and antiviral properties are excellent.
The present invention uses zeolite powder, diatomite and other porous material as stuffing to increase the porosity of the coating and the adsorption of virus particle, so that bacteria and virus are adsorbed onto the surface of the coating and the effective antiviral component, copper containing compound, in the coating can react directly with bacteria and virus to eliminate infectivity.
According to the preparation method of the coating, the hydrophilic emulsion is used as the film forming substance, so that the obtained coating has super-hydrophilic characteristics, and compared with the coating prepared by using the 502 styrene-acrylic emulsion as the film forming substance, the coating prepared by using the 502 styrene-acrylic emulsion as the film forming substance is more hydrophilic and has excellent hydrophilic performance, and is more beneficial to the adsorption of the coating on virus particles. Therefore, the 502 styrene-acrylic emulsion is preferably used as a film-forming substance of the antiviral coating, and is very important for the design of the subsequent antiviral coating.
In the specific application of the method, the material is selected,
example 1
The embodiment provides a preparation method of a copper-containing compound bactericidal and antiviral coating, which comprises the following steps:
(1) Firstly, 2 parts of prepared copper-containing compound, 14 parts of diatomite and 8 parts of water are mixed according to a proportion, and a functional material suspension is prepared by stirring for later use.
(2) Mixing 10 parts of water, 0.1 part of hydroxyethyl cellulose, 0.8 part of polyethylene glycol and 1.5 parts of other auxiliary agents, and stirring at 600-800rpm to prepare slurry;
(3) Sequentially adding 18 parts of titanium dioxide and 14 parts of diatomite into the obtained slurry, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
(4) Adding 30 parts of 502 styrene-acrylic emulsion, 0.8 part of film-forming additive and 0.8 part of defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm;
(5) And (3) adding the functional material suspension obtained in the step (1), and stirring at a low speed of 500-600rpm to obtain the coating.
Wherein the preparation steps of the copper-containing compound are as follows:
(1) 0.02mol of Fe (NO) 3 ) 3 •9H 2 O and 0.02mol Cu (NO) 3 ) 2 •3H 2 Dissolving O in 160 mL distilled water to form a clear solution;
(2) then 0.4mol of NaOH is added, and the mixture is stirred to obtain a colloidal suspension, and 3ml of propionaldehyde is added into the suspension as a reducing agent, and the mixture is stirred and mixed.
(3) The suspension was transferred to a 200ml teflon lined stainless steel autoclave and subjected to hydrothermal reaction at 200 ℃ for 48h.
(4) After the hydrothermal reaction, the high-pressure kettle is naturally cooled to room temperature, and the solid product is filtered, washed and dried to obtain the copper-containing compound.
Example 2
A preparation method of a copper-containing compound bactericidal antiviral coating comprises the following steps:
(1) Firstly, 1 part of prepared copper-containing compound, 15 parts of diatomite and 8 parts of water are mixed according to a proportion, and a functional material suspension is prepared by stirring for later use.
(2) Mixing 10 parts of water, 0.1 part of hydroxyethyl cellulose, 0.8 part of polyethylene glycol and 1.5 parts of other auxiliary agents, and stirring at 600-800rpm to prepare slurry;
(3) Sequentially adding 18 parts of titanium dioxide and 14 parts of diatomite into the obtained slurry, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
(4) Adding 30 parts of 502 styrene-acrylic emulsion, 0.8 part of film-forming additive and 0.8 part of defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm;
(5) And (3) adding the functional material suspension obtained in the step (1), and stirring at a low speed of 500-600rpm to obtain the coating.
Wherein the preparation steps of the copper-containing compound are as follows:
(1) 0.02mol of Fe (NO) 3 ) 3 •9H 2 O and 0.02mol of Cu (NO) 3 ) 2 •3H 2 Dissolving O in 160 mL distilled water to form a clear solution;
(2) then 0.4mol NaOH is added, and the mixture is stirred to obtain colloidal suspension, and 3ml propionaldehyde is added into the suspension as a reducing agent, and the mixture is stirred and mixed.
(3) The suspension was transferred to a 200ml teflon lined stainless steel autoclave and subjected to hydrothermal reaction at 200 ℃ for 48h.
(4) After the hydrothermal reaction, the high-pressure kettle is naturally cooled to room temperature, and the solid product is filtered, washed and dried to obtain the copper-containing compound.
Example 3
(1) Firstly, 2 parts of prepared Ce-doped copper-containing compound powder, 14 parts of diatomite and 8 parts of water are mixed in proportion, and a functional material suspension is prepared by stirring for later use.
(2) Mixing 10 parts of water, 0.1 part of hydroxyethyl cellulose, 0.8 part of polyethylene glycol and 1.5 parts of other auxiliary agents, and stirring at 600-800rpm to prepare slurry;
(3) Sequentially adding 18 parts of titanium dioxide and 14 parts of diatomite into the obtained slurry, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
(4) Adding 30 parts of 502 styrene-acrylic emulsion, 0.8 part of film-forming additive and 0.8 part of defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm;
(5) And (3) adding the functional material suspension obtained in the step (1), and stirring at a low speed of 500-600rpm to obtain the coating.
The preparation method of the Ce-doped copper-containing compound comprises the following steps:
(1) 0.02mol of Fe (NO) 3 ) 3 •9H 2 O and 0.02mol Cu (NO) 3 ) 2 •3H 2 O is dissolved in 160 Forming a clear solution in mL of distilled water;
(2) then 0.4mol NaOH is added, and the mixture is stirred to obtain colloidal suspension, and 3ml propionaldehyde is added into the suspension as a reducing agent, and the mixture is stirred and mixed.
(3) The suspension was transferred to a 200ml teflon lined stainless steel autoclave and subjected to hydrothermal reaction at 200 ℃ for 48h.
(4) After the hydrothermal reaction, the high-pressure kettle is naturally cooled to room temperature, and the solid product is filtered, washed and dried to obtain the copper-containing compound.
(5) Dissolving cerous nitrate with certain molar mass in 25g of deionized water, stirring to dissolve the cerous nitrate, and adding 0.5g of prepared CuFeO 2 Powder is stirred, filtered and dried to obtain Ce-doped CuFeO 2 And (3) powder functional materials.
Example 4
(1) Firstly, 2 parts of La-doped copper-containing compound powder, 14 parts of diatomite and 8 parts of water which are prepared are mixed in proportion, and a functional material suspension is prepared by stirring for later use.
(2) Mixing 10 parts of water, 0.1 part of hydroxyethyl cellulose, 0.8 part of polyethylene glycol and 1.5 parts of other auxiliary agents, and stirring at 600-800rpm to prepare slurry;
(3) Sequentially adding 18 parts of titanium dioxide and 14 parts of diatomite into the obtained slurry, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
(4) Adding 30 parts of 502 styrene-acrylic emulsion, 0.8 part of film-forming additive and 0.8 part of defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm;
(5) And (4) adding the functional material suspension obtained in the step (1), and stirring at a low speed of 500-600rpm to obtain the coating.
The preparation method of the La-doped copper-containing compound comprises the following steps:
(1) 0.02mol of Fe (NO) 3 ) 3 •9H 2 O and 0.02mol Cu (NO) 3 ) 2 •3H 2 Dissolving O in 160 mL distilled water to form a clear solution;
(2) then 0.4mol of NaOH is added, and the mixture is stirred to obtain a colloidal suspension, and 3ml of propionaldehyde is added into the suspension as a reducing agent, and the mixture is stirred and mixed.
(3) The suspension was transferred to a 200ml teflon lined stainless steel autoclave and subjected to hydrothermal reaction at 200 ℃ for 48h.
(4) After the hydrothermal reaction, the high-pressure kettle is naturally cooled to room temperature, and the solid product is filtered, washed and dried to obtain the copper-containing compound.
(5) Dissolving lanthanum nitrate with certain molar mass in 25g of deionized water, stirring to dissolve the lanthanum nitrate, and adding 0.5g of prepared CuFeO 2 Stirring, filtering and drying the powder to obtain La-doped CuFeO 2 And (3) powder functional materials.
Comparative example 1
A preparation method of a copper-containing compound bactericidal antiviral coating comprises the following steps:
(1) Firstly, 2 parts of prepared copper-containing compound, 14 parts of diatomite and 8 parts of water are mixed according to a proportion, and a functional material suspension is prepared by stirring for later use.
(2) Mixing 10 parts of water, 0.1 part of hydroxyethyl cellulose, 0.8 part of polyethylene glycol and 1.5 parts of other auxiliary agents, and stirring at 600-800rpm to prepare slurry;
(3) Sequentially adding 18 parts of titanium dioxide and 14 parts of diatomite into the obtained slurry, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
(4) Adding 30 parts of EVA emulsion, 0.8 part of film-forming additive and 0.8 part of defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm;
(5) And (3) adding the functional material suspension obtained in the step (1), and stirring at a low speed of 500-600rpm to obtain the coating.
Wherein the preparation steps of the copper-containing compound are as follows:
(1) 0.02mol of Fe (NO) 3 ) 3 •9H 2 O and 0.02mol Cu (NO) 3 ) 2 •3H 2 Dissolving O in 160 mL distilled water to form a clear solution;
(2) then 0.4mol NaOH is added, and the mixture is stirred to obtain colloidal suspension, and 3ml propionaldehyde is added into the suspension as a reducing agent, and the mixture is stirred and mixed.
(3) The suspension was transferred to a 200ml teflon lined stainless steel autoclave and subjected to hydrothermal reaction at 200 ℃ for 48h.
(4) After the hydrothermal reaction, the high-pressure kettle is naturally cooled to room temperature, and the solid product is filtered, washed and dried to obtain the copper-containing compound.
Comparative example 2
A preparation method of a copper-containing compound bactericidal antiviral coating comprises the following steps:
(1) Firstly, 2 parts of prepared copper-containing compound, 14 parts of calcite and 8 parts of water are mixed according to a proportion, and functional material suspension is prepared by stirring for later use.
(2) Mixing 10 parts of water, 0.1 part of hydroxyethyl cellulose, 0.8 part of polyethylene glycol and 1.5 parts of other auxiliary agents, and stirring at 600-800rpm to prepare slurry;
(3) Sequentially adding 18 parts of titanium dioxide and 14 parts of calcite into the obtained slurry, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
(4) Adding 30 parts of 502 styrene-acrylic emulsion, 0.8 part of film-forming additive and 0.8 part of defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm;
(1) And (3) adding the functional material suspension obtained in the step (1), and stirring at a low speed of 500-600rpm to obtain the coating.
Wherein the preparation steps of the copper-containing compound are as follows:
(1) 0.02mol of Fe (NO) 3 ) 3 •9H 2 O and 0.02mol Cu (NO) 3 ) 2 •3H 2 Dissolving O in 160 mL distilled water to form a clear solution;
(2) then 0.4mol NaOH is added, and the mixture is stirred to obtain colloidal suspension, and 3ml propionaldehyde is added into the suspension as a reducing agent, and the mixture is stirred and mixed.
(3) The suspension was transferred to a 200ml teflon lined stainless steel autoclave and subjected to hydrothermal reaction at 200 ℃ for 48h.
(4) After the hydrothermal reaction, the high-pressure kettle is naturally cooled to room temperature, and the solid product is filtered, washed and dried to obtain the copper-containing compound.
Comparative example 3
A preparation method of a copper-containing compound bactericidal antiviral coating comprises the following steps:
(1) Mixing 18 parts of water, 0.1 part of hydroxyethyl cellulose, 0.8 part of polyethylene glycol and 1.5 parts of other auxiliary agents, and stirring at 600-800rpm to prepare slurry;
(2) Sequentially adding 18 parts of titanium dioxide and 28 parts of diatomite into the obtained slurry, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
(3) Adding 32 parts of 502 styrene-acrylic emulsion, 0.8 part of film-forming additive and 0.8 part of defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm; and (5) preparing the coating.
As can be seen from the comparison between example 1 and example 2, the antibacterial and antiviral rates of the obtained paint are significantly improved with the increase of the addition amount of the copper-containing compound (see table 1 and fig. 2), so that the copper-containing compound is one of the important determinants of the performance of the antibacterial and antiviral paint.
Comparing examples 1, 3 and 4, cuFeO doped with Ce and La was obtained 2 When the powder functional material is added into the paint, the bactericidal and antiviral performances of the obtained paint are superior to those of the undoped copper-containing compound paint (see table 1).
Compared with the example 1 and the comparative example 1, the comparative example 1 has the advantages that the 502 styrene-acrylic emulsion is replaced by the EVA emulsion, the antibacterial and antiviral performance of the obtained coating is remarkably reduced (see table 1), which shows that the 502 styrene-acrylic emulsion is not replaceable, and the research finds that the hydrophilicity of the copper-containing compound coating obtained by the EVA emulsion is far lower than that of the coating prepared by the 502 styrene-acrylic emulsion, which also shows that the hydrophilicity and hydrophobicity of the coating are also one of the important factors determining the antibacterial and antiviral functions.
It can be seen from comparison between example 1 and comparative example 2 that, when the diatomite in the example is replaced by calcite, the antibacterial and antiviral properties of the obtained paint are also significantly reduced (see table 1), because the diatomite is porous and the calcite is less porous or non-porous, and the filler with a porous structure is added into the paint, the coating has a rich void structure, which is helpful for the paint surface to actively adsorb bacteria and viruses, and the viruses adsorbed in the pores lose activity to a certain extent due to dehydration, and in addition, the adsorption of the void structure is helpful for the viruses, bacteria and antiviral components to act, so as to exert the antibacterial and antiviral effects. Therefore, the addition of the porous filler is also an important factor influencing the performance of the bactericidal and antiviral coating.
As can be seen from comparison between example 1 and comparative example 3, the copper-containing compound is not added, which results in almost no activity of the antibacterial and antiviral properties of the paint (see Table 1), indicating that the copper-containing compound is the most important factor for determining the antibacterial and antiviral properties of the paint.
Table 1 shows the antibacterial and antiviral rates of the copper-containing compound antibacterial and antiviral coating
The phase structure and purity of the copper-containing compound was characterized by X-ray diffraction (XRD). From CuFeO 2 The XRD pattern of the functional material containing the copper compound is known (FIG. 1), and the obtained sample is CuFeO with high crystallinity 2 . Position of peak and rhombus structure CuFeO 2 The standard data (JCPDS card number 75-2146, space group, R-3M) of (A) well matches. No CuO, cu was found 2 O, Fe 2 O 3 And CuFe 2 O 4 And the impurity peaks indicate that the obtained sample has high purity.
The hydrophilic emulsion, the porous filler and the functional material added with the copper-containing compound are cooperatively realized in the formula of the invention. The addition of the hydrophilic emulsion enables the obtained coating to have high hydrophilicity, the addition of the porous filler enables the surface of the obtained coating to form a porous structure, and the addition of the functional material containing the copper compound enables the obtained coating to destroy genomes of microorganisms such as bacteria and viruses and limit metabolism, respiration and reproduction processes of the microorganisms and the viruses. The coating obtained by the invention has super-hydrophilicity, porous adsorbability and microorganism killing effect, so as to play a role in high-efficiency, long-term sterilization and antivirus.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The recitation of numerical ranges in this disclosure includes all numbers subsumed within that range and includes any two numbers subsumed within that range. Different values of the same index appearing in all embodiments of the invention can be combined arbitrarily to form a range value.
The features of the invention claimed and/or described in the specification may be combined, and are not limited to the combinations set forth in the claims by the recitations therein. The technical solutions obtained by combining the technical features in the claims and/or the specification also belong to the scope of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The bactericidal and antiviral paint is characterized by comprising a copper-containing compound, a hydrophilic emulsion and a porous filler.
2. The bactericidal and antiviral coating of claim 1, wherein the copper-containing compound is CuFeO 2 Powder or Ce, la or Bi doped CuFeO 2 And (3) powder.
3. The bactericidal and antiviral coating of claim 2, wherein the CuFeO is 2 The preparation method of the powder comprises the following steps:
0.02-0.04mol Fe (NO) 3 ) 3 •9H 2 O and 0.02-00.4mol Cu (NO) 3 ) 2 •3H 2 Dissolving O in 120-160 mL distilled water to form a clear solution; then adding 0.4-0.6mol of NaOH, and stirring to obtain a colloidal suspension; adding 2-4ml of propionaldehyde into the suspension;
then, transferring the suspension into a 200ml stainless steel autoclave with a polytetrafluoroethylene lining, and carrying out hydrothermal reaction at 200 ℃ for 24-48 h;
after hydrothermal reaction, the autoclave is naturally cooled to room temperature, and the solid product is filtered, washed, dried and ground to obtain the catalyst.
4. The bactericidal and antiviral coating of claim 3, wherein the CE, la or Bi doped CuFeO 2 The preparation method of the powder comprises the following steps:
first, 1.3 × 10 -3 -3.3×10 -3 Dissolving mol metal nitrate in 18-28g deionized water, stirring to dissolve, adding 0.2-0.5g prepared CuFeO 2 The powder is prepared by stirring, filtering, drying and grinding.
5. The bactericidal and antiviral coating material as claimed in claim 4, wherein the metal nitrate is one or more of cerium nitrate, lanthanum nitrate and bismuth nitrate.
6. The bactericidal and antiviral coating material as claimed in any one of claims 1 to 5, wherein the hydrophilic emulsion is one or more of 502 styrene-acrylic emulsion, pure acrylic emulsion and silicone-acrylic emulsion.
7. The bactericidal and antiviral coating material as claimed in claim 6, wherein the porous filler is one or both of zeolite powder and diatomite.
8. The bactericidal and antiviral coating material as claimed in claim 1, wherein the copper-containing compound is 0.5 to 2.5 parts by weight, the hydrophilic emulsion is 20 to 35 parts by weight, and the porous filler is 20 to 35 parts by weight;
also comprises the following components: 10-30 parts of water, 0.8-1.2 parts of film-forming additive, 0.8-1.2 parts of defoaming agent, 0.1-0.3 part of hydroxyethyl cellulose, 0.8-1.2 parts of polyethylene glycol, 1.2-3 parts of other additives and 15-25 parts of pigment;
the other auxiliary agents are a mixture of a wetting agent, a dispersing agent, a thickening agent and a pH regulator, wherein the mass ratio of the wetting agent to the dispersing agent to the thickening agent to the pH regulator is 1-1.2.
9. A method for preparing the bactericidal and antiviral paint as claimed in claim 8, which comprises the following steps:
s1, firstly, mixing the obtained copper-containing compound, porous filler and water in proportion, and stirring to prepare a functional material suspension for later use;
s2, mixing water, hydroxyethyl cellulose, polyethylene glycol and other auxiliary agents, and stirring at 600-800rpm to obtain slurry;
s3, adding the pigment and the porous filler into the obtained slurry in sequence, and stirring at a high speed of 1000-1500rpm for 20-30min to obtain a base material;
s4, adding the hydrophilic emulsion, the film-forming additive and the defoaming agent into the obtained base material, and uniformly stirring at a low speed of 500-600 rpm;
and S5, adding the functional material suspension, and stirring at a low speed of 500-600rpm to obtain the coating.
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